p-Toluenesulfonic acid monohydrate
- CAS Number
- 6192-52-5
- HSN Code
- 29041090
- Molecular Formula
- C7H8O3S·H2O
- Catalogue Number
- AL01529
- Purity
- ≥ 98%
- Molecular Weight
- 190.22 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
p-Toluenesulfonic acid monohydrate (CAS No. 6192-52-5) is a strong organic acid and a widely utilized catalyst in organic synthesis. It is known for its effectiveness in promoting various chemical reactions, particularly in the formation of esters and acetals. This compound is a white crystalline powder that is hygroscopic in nature, meaning it can absorb moisture from the air. Its high purity grade of 98% makes it suitable for demanding applications in both laboratory and industrial settings.
Also known as Toluene-4-sulfonic acid monohydrate.
- Catalogue No.
- AL01529
- CAS Number
- 6192-52-5
- Molecular Formula
- C7H8O3S·H2O
- Molecular Weight
- 190.22 g/mol
- HSN Code
- 29041090
- Grade
- 98%
- Product Form
- Substance
p-Toluenesulfonic acid monohydrate appears as a white crystalline powder. It has a melting point of approximately 105 °C and a boiling point of around 200 °C. The compound is highly soluble in water, with a solubility of about 1 g/mL at 20 °C. Its density is approximately 1.2 g/cm³. The compound has a pH value of around 1 when dissolved in water, indicating its strong acidic nature. It has a characteristic odor reminiscent of sulfonic acids, which can be detected at low concentrations.
- Appearance
- White crystalline powder
- Shelf Life
- 2 years
- Packaging
- Available in 500 g and 1 kg containers
- Storage
- Store in a cool, dry place, away from moisture and incompatible materials.
1.1 — Product identifier
- Chemical Name
- p-Toluenesulfonic acid monohydrate
- Catalogue No.
- AL01529
- Product form
- Substance
- CAS Number
- 6192-52-5
- EC Number
- 228-052-0
- Grade
- 98%
- EC Index Number
- 650-001-00-3
- Chemical Formula
- C7H8O3S·H2O
- HSN Code
- 29041090
- Synonyms
- Toluene-4-sulfonic acid monohydrate
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a strong acid catalyst in organic synthesis
- Uses advised against
- Not specified
1.3 — Details of the supplier of the safety data sheet
- Company identification
- Address:- 102, B wing, Savgan Heights, RTO Lane,Andheri (W), Mumbai-400 053Maharashtra, India.
1.4 — Emergency Contact Details
- Phone / e-Mail
- Phone : +91 22 26317055 Mobile : +91 9820385757 e-mail : info@alphachemika.co.in
2.3 — Other hazards
- Other hazards
- Corrosive to metals; may cause skin burns and eye damage.
3.1 — Substance
- Name
- p-Toluenesulfonic acid monohydrate
- CAS No.
- 6192-52-5
4.1 — Description of first aid measures
- First-aid measures after inhalation
- Move to fresh air. If symptoms persist, seek medical attention.
- First-aid measures after skin contact
- Wash skin thoroughly with soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention.
- First-aid measures after ingestion
- Rinse mouth. Do NOT induce vomiting. Seek medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- May cause irritation to the respiratory tract, skin burns, and severe eye damage.
4.3 — Indication of any immediate medical attention and special treatment needed
- General information
- Treat symptomatically. Show this safety data sheet to the treating physician.
5.1 — Extinguishing media
- Suitable extinguishing media
- Water spray, carbon dioxide, dry chemical powder, foam.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- May emit toxic fumes in a fire. Use water spray to cool containers exposed to fire.
5.3 — Advice for firefighters
- Protection during firefighting
- Do not enter fire area without proper protective equipment, including respiratory protection.
6.1.1 — For non-emergency personnel
- Emergency procedures
- Contain spill and absorb with inert material. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Wear appropriate protective equipment. Clean up spills immediately to prevent environmental contamination.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Use personal protective equipment. Avoid contact with skin and eyes. Ensure adequate ventilation.
- Hygiene measures
- Wash hands and other exposed areas with mild soap and water before eating, drinking or smoking and when leaving work.
7.2 — Conditions for safe storage, including any incompatibilities
- Storage conditions
- Store in a tightly closed container in a cool, dry place. Keep away from incompatible materials.
8.2 — Exposure controls
- Hand protection
- Protective gloves (e.g. nitrile rubber)
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use appropriate respiratory protection if ventilation is inadequate.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White
- Odour
- Characteristic, sulfonic acid-like
- Odour threshold
- Not determined
- pH value
- 1 (1% solution)
- Relative evaporation rate (butylacetate=1)
- Not determined
- Melting point
- 105 °C
- Freezing point
- Not determined
- Boiling point
- 200 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not determined
- Flammability (solid, gas)
- Not flammable
- Vapour pressure
- Not determined
- Relative vapour density at 20°C
- Not determined
- Density
- 1.2 g/cm³
- Solubility
- Soluble in water
- Log Pow
- Not determined
- Viscosity, kinematic
- Not determined
- Viscosity, dynamic
- Not determined
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions. Reacts with strong bases and oxidizing agents.
10.2 — Chemical stability
- Chemical stability
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- No dangerous reactions known under normal conditions of use.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong bases, strong oxidizers, and reactive metals.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Not classified as acutely toxic; however, may cause irritation and burns.
- Skin corrosion/irritation
- Causes severe skin burns and eye damage.
- Serious eye damage/irritation
- Causes serious eye damage.
- Respiratory or skin sensitisation
- Not a skin sensitizer.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- May cause respiratory irritation.
- Specific target organ toxicity (repeated exposure)
- Not classified
12.1 — Toxicity
- Toxicity information
- Not specified
12.2 — Persistence - degradability
- Persistence - degradability
- Not specified
12.3 — Bioaccumulative potential
- Bioaccumulative potential
- Not specified
12.4 — Mobility in soil
- Mobility in soil
- Not specified
12.6 — Other adverse effects
- Environmental precautions
- Not specified
13.1 — Waste treatment methods
- Additional Info
- Dispose of contents/container in accordance with local, regional, national and international regulations.
14.1 — UN number
- UN-No. (ADR)
- 2585
- UN-No. (IMDG)
- 2585
- UN-No. (IATA)
- 2585
- UN-No. (ADN)
- 2585
- UN-No. (RID)
- 2585
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- p-Toluenesulfonic acid, solid
- Proper Shipping Name (IMDG)
- p-Toluenesulfonic acid, solid
- Proper Shipping Name (IATA)
- p-Toluenesulfonic acid, solid
- Proper Shipping Name (ADN)
- p-Toluenesulfonic acid, solid
- Proper Shipping Name (RID)
- p-Toluenesulfonic acid, solid
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 8
14.4 — Packing group
- Packing group (ADR)
- III
- Packing group (IMDG)
- III
- Packing group (IATA)
- III
- Packing group (ADN)
- III
- Packing group (RID)
- III
14.5 — Environmental hazards
- Dangerous for the environment
- Not specified
- Marine pollutant
- Not specified
- Other information
- No supplementary information available
15.1 — Safety, health and environmental regulations/legislation specific for the substance or mixture
- 15.1.1 EU-Regulations
- Not specified
p-Toluenesulfonic acid monohydrate is extensively used as an acid catalyst in various organic reactions, including esterification, acetal formation, and Fischer indole synthesis. It is commonly employed in the production of pharmaceuticals, agrochemicals, and polymers. Additionally, it serves as a catalyst in the synthesis of surfactants and in the formulation of adhesives and sealants. Its ability to facilitate reactions under mild conditions makes it a valuable reagent in both academic research and industrial applications.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01529
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 190.22 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 99.5% |
| Moisture Content | ≤ 1% | 0.5% |
| Residue on Ignition | ≤ 0.5% | 0.2% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Fully soluble |
The above product is expected to comply with 98% grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% | ≥ 98% | 105 °C | ≤ 1% | ≤ 0.5% | None detected | Soluble in water |
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